Synonyms of 'unsaid'
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If you refer to someone's tacit agreement or approval, you mean they are agreeing to something or approving it without actually saying so, often because they are unwilling to admit to doing so.
a tacit admission that a mistake had been made
When there is an unspoken agreement or understanding between people, their behaviour shows that they agree about something or understand it, even though they have never spoken about it.
There had been an unspoken agreement between them.
Thesaurus for unsaid from the Collins English Thesaurus
If something is left unsaid or goes unsaid in a particular situation , it is not said, although you might have expected it to be said.